There's a Suitable Dark Room for Everyone [Quick Transmigration]

A story about an author who churns out novels at a crazy pace, abandons them as soon as the sex scenes are done, and is forced to transmigrate into his own books and get a happy ending with the male lead after he's gone dark.

(Time flows differently in each world. After the protagonist abandons a story, time keeps moving forward. In other words, the protagonist disappears right after he and the male lead "finish fooling around".)

Worlds so far:

A spoiled young master, a flower of wealth and privilege who causes trouble at every turn, as the bottom x a former loyal servant who becomes a domineering general after being abandoned as the top

A kind-hearted, amnesiac double agent as the bottom x a leader who rises again after being "betrayed" by his lover as the top

A silver-tongued human scammer as the bottom x a vengeful ghost who waits a thousand years, gets tricked, and turns dark as the top

A lofty master who runs away while carrying a child as the bottom x a devoted, patient, jealous disciple as the top

Theme: Never leave things unfinished, especially by abandoning a story halfway through.